Oil shale exploration based on seismic ambient noise
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摘要: 作为重要的非常规油气资源,油页岩的勘探开发日益受到重视。利用地震环境噪声(微动)对地下介质的横波速度成像是一种无源、高效、低成本的地震勘探方法,是更符合“环保要求的潜在油页岩勘探新方法。本文首次利用共中心面元空间自相关微动勘探方法,在松辽盆地开展了含油页岩地层识别研究。研究结果表明,共中心面元空间自相关微动勘探方法的观测系统可根据实际情况灵活多变,横波速度剖面与测线位置钻孔编录结果对应较好,能很好地划分主要地层,主要含油页岩的嫩江组二段呈现低横波速度特征。
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关键词:
- 地震环境噪声 /
- 油页岩 /
- 共中心面元空间自相关 /
- 松辽盆地
Abstract: As oil shale is an important unconventional oil and gas resource,its exploration and development has received increasing attention.Microtremor exploration based on seismic ambient noise is a passive,efficient and low-cost method of seismic exploration,which can be used to image the shear wave velocity of underground medium and can become a potential new exploration method for oil shale more in line with the requirements of "environmental protection".For the first time,the authors applied microtremor method to oil shale exploration based on the spatial cross correlations of common central panel and conducted a study of the identification of oil shale in Songliao Basin.The results show that the geometry of microtremor method can be flexible according to the real situation,the shear wave velocity profile corresponds well with the results of borehole cataloging near the survey line and the main stratum is well divided.The second member of the Nenjiang Formation,which is mainly oil-bearing shale,exhibits low velocity characteristics. -
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